化学作为一门实用性、创造性科学,已经为人类认识物质世界和人类的文明进步做出了巨大贡献。化学知识存在于我们生活生产的各个方面,世界上的所有生物的生命、生存都离不开化学。作为一个庞大的知识体系,化学可以解决我们生活中很多的问题。例如,如果没有化肥农药的合成,世界上将有一半的人还在忍饥挨饿;穿的方面人们离不开各种的合成纤维;住的方面人 As a practical and creative science, chemistry has made a great contribution to the progress of civilization in the material world and mankind. Chemical knowledge exists in all aspects of the production of our lives, all the life of the world's creatures are inseparable from the chemical. As a vast body of knowledge, chemistry can solve many problems in our lives. For example, half of the world's population will still be hungry without the synthetic fertilizers and pesticides; people can not do without synthetic fibers;